‰  NOW 25 WPM  ‰  TEXT IS FROM SEPTEMBER 2013 QST  PAGE 36‰

OF 1R5 A AND A SWITCHING TIME OF 2 MS.  THEY WERE CHOSEN BECAUSE OF THEIR
ABILITY TO MAINTAIN A PARTICULAR SETTING WITHOUT BEING CONTINUOUSLY
ENERGIZED, AND BECAUSE THEY WERE HERMETICALLY SEALED AND SUITABLE FOR
OPERATION OUTSIDE.  THE SWITCHES HAD AN ACTUATION CURRENT OF 16 MA SUITABLE
FOR CONTROL BY TTL PULL DOWN DEVICES.  THIS MATRIX WAS BUILT ON GLASS EPOXY
STRIP BOARD AND THE BOXED ROUTER IS SHOWN IN FIGURE 7.  SWITCHING CELL
DESIGN THE BASIS OF THE DESIGN IS A GROUP OF THREE SWITCHES THAT ARE USED
TO ATTACH AN INDIVIDUAL ELEMENT TO ONE OF THREE FEEDERS L LEAD, C CENTER
AND R REAR.  THE MODULE FOR ANTENNA ELEMENT 1 IS SHOWN IN FIGURE 8.  THE
SWITCHES USED WERE THE CRYCOM FRS32026 6 WITH RESET, 6 AND 5, AND SET
COILS, 2 AND 1, THAT COULD BE OPERATED BY THE APPLICATION OF 6 V.  THE
RESET SIGNAL CAUSED THE SWITCH TO OPEN AND REMAIN OPEN ON THE REMOVAL OF
THIS VOLTAGE.  IT WAS THEN READY FOR CLOSURE ON THE APPLICATION OF A 6 V
‰  END OF 25 WPM TEXT  ‰  QST DE W1AW  ƒ